Filing machine



June 9, 1936. B. GROB Er Al.

FILING MACHINE Original Filed May 22, 1930 improved motor driven ling are movable Ain one direction only Reissued lJune 9, 1936 UNITED STATESI PATENT OFFICE FILING MACHINE Beniamin Grob and Theodore Grob, West Allis, Wis.

original No.' 1.949.742.

Serial No. 454,593, Ma

March 2, 1936, Serial No. 66,776

for reissue ZZClalms.

nated as filing machines.

.An object of the invention isto provide an improved/abrasion device which lis-simple and durable in general construction,

is to provide various improvements in the conf' struction of power operated filing machines or the like, wherein the abrasive or working surfaces while engaging the work, and travel at substantially constant from the use of this invention, will be readily apparent from the following description.

. A clear conception of an embodiment of each of the several features of the improvement, and

forming a part of this specification in which like reference characters designate the same, or similar parts in the several views.

Fig. 1 is a part sectional side elevation of an machine.

Fig. 2 is a front view ofthe improved filing machine, a portion of the frame having been broken away in order to expose internal structure to view.

Fig. 3 is an' enlarged side view of a fragment of f the endless carrieror chain and several of the files.

Fig. 4 is a similarly enlarged part sectional rear dated March 6, 1934.. y

22, 1930. Application view of a fragment of the chain and one of the les.

Fig. 5 is a similarly enlarged transverse section through the chain and one of the files.

Fig. 6 is a rear view of the le and chain re- 5 action guide.

Fig. 7 is a side view of the le and chain reaction guide shown in Fig. 6. l

Fig. 8 is a top view of the reaction guide shown in Figs. 6 and 7. l

Fig. 9 isa top view of the reaction guide and of the support therefor, showing `the le carrier and one of the files cooperating therewith.

lower rotary members or wheels l, 5 respectively providing a support for the chain 2; a. mainframe 23 6 supporting the wheels I, 5 inl vertically spaced relation to each other; an electric motor 1 supported upon the rear of the frame 6; and driving mechanism connecting the motor with the lower wheel.

Theendless carrier or chain 2 is of Aimproved construction as shown in Figs. 3, 4' and 5, consisting of 'alternate U-shaped sheet metal links 3|, 32, and intervening solid links 33 disposed between the side walls of the links 3|, 32. The 35 U-shaped sheet metal links 3| are approximately double the length of the links 32, and the successive files A3 are rigidly attached to the successive long links 3| l by spot welds 30 or the like. While fiat illes 3 have been illustrated, these 40 files may obviously be half round, triangular or of any other cross-section. The ends of .the solid links 33 and the adjacent portions of the side walls of the -U-shaped links 3|, 32 are provided 45 inner surfaces of the sideA 36 of each pivot pin 34 coacts with the larger and the filing on the inside of the opening can opening in the adjacentJ side wal1,and the overproceed. all length of each pin 34 is approximately equal The mechanism for transmitting motion from to the outside width of the linksr 3|, 32.y One of the electric motor 1 to the lower wheel 5 com- 5 the long U-shaped links 3I may be provided with prises a pair. of belt drives one of which is associ- 5 hook notches 36in order to permit disconnection ated directly with the motor 1 and the other of and assembly of the endless carrier. which delivers rotary motion directly to the wheel The upper rotary member or wheel 4 is rotat- 5. The initial'drive consists of a. pair of cone ably supported upon vertically adjustable slides sheaves 21, 25 having several sets of alined l 9 movably confined between parallel spacers 23 grooves providing for several speed variations, 10 which are clamped between the main frame 5 ,and an endless V belt 20 adapted tointerchangeandthe auxiliary frame 26.l The slides 9 are `ably coact with the grooves or the several sets. suspended from a threaded adjusting rod II) the lThe `driven sheave 25 of the initial drive is seupper end of which hasscrew thread coaction cured to the sheave 23 of thenal drive as shown l5 with a hand wheel I2. A coil spring II located in Fg. 2, both of the sheaves 25, 23 being rotat- 15 between the hand wheel I2 and the upper ex ably supported upon a lshaft supported in the tremities of the frame 6, 26, functions to resililower end of` a pivoted arm 22. The sheave 23 ently urge the upper wheel 4 away from the lower is drivingly connected with the sheave 2l sewheel 5 to thereby properly tension the endless cured to the lower wheel 5, by means of a V carrier or chain 2. belt I8, the tension of which is capable of being 20 The lowerl rotary member or wheel 5 is supvaried with the aid of adjusting mechanism 24 ported for rotation about a flxedaxis at the lower shown in Figs. 1 and 2. The weight of the arm portion of the main frame Ii. The wheels 4, 5 22 and the elements carried thereby serves to are provided with alined circular peripheral tension the belt 2D of the initial drive while 25 grooves within which the chain 2 travels and permitting ready transfer of the belt 20 to any 25 frictionally engages the wheels, and the tension set of the alined grooves in the sheaves 25, 2]. adjusting mechanism associated with the upper During normal operation .of the machine, the wheel 4 serves to regulate the frictional driving motor 1 is operating to drive the wheel 5 at the contact. The axes of rotation of the wheels 4, speed selected, thereby causing the endless series 5 are spaced apart sulciently to provide a subof iilesA 3 to travel in succession around the 30 stantially rectilineal stretch of files 3 of considwheels 4, 5 and to be presented in rectilineal order erable length at the front of the machine, this above the work table or support 8. Pieces of stretch being normally movable downwardly material resting upon the support 8 may then be through a central opening in a tiltable work' pressed against the roughened surfaces of the table or support 8. A reaction roller I3`rotatiiles 3 which quickly abrade the presented sur- 35 I ably supported in the lower end of the auxiliary faces or projections. Depending upon the posiframe 26, engages the rear of the carrier chain tion of tilted adjustment of the work table, the 2 as it leaves the upper wheel 4 and is so disposed files 3 may be caused to cut at any desired angle, that the chain 2 is forced forwardly beyond a and the initial drive also permits movement oi 40 position of tangency relative to the wheel 4, as the files 3 at three different selected speeds. The 40 it proceeds toward the work support 8. An adguide rollers I3, I! and the relatively stiff ilxed justable guide roller I4 likewise supported upon guide I5 permit the pieces to be forced against the lower end of the frame 26, engages the front the filing surfaces i with considerable pressure faces of the successive files 3 and serves to steady without umlesirably,v deecting the working the working stretch portion of the machine. stretch of. the carrier chain, and the compactness 45 The work table or support 8 is tiltably supof the guide I5 enables `use of the device for a ported upon the frame 6 some distance below considerable range of purposes. The adjustable the guide rollers I3, I4, end extends entirely plate le eliminates danger of having the flies a around the working stretch of the endless series carry the piece of material being tiled, through 50. of les 3. The support 8 may be locked'to the the central opening in the table 8, and the im- 50 frame 6 in any desired position, and the angle proved driving mechanism connecting the motor of tilt of the support 8 may be accurately deter- 1 and the lower wheel 5 besides being readily admined with the aid 0f a Segment gage la- AIl justable to produce efficient driving, is also suffiadjustable plate I6 which is slidably associated ciently flexible to protect the motor against 55. with the work support 8, serves to minimize the shock. The hand wheel l2 may be manipulated 55 gap between files 3 and the W011i Supporting to properly tension the chain 2 and to eliminate surface as the support II` is t'lted. A Stationary slippage, and the roller I4 may be adjusted to guide I5 is formed and disposed to simultaneously accommodate files of variousI thickness. engage the rear surfaces of both the chain links The improved chain structure is not only 6 3|, 32, as and those of the mes 3 es they enter simple and strong, but may be manufactured at the working zone, this guide I5 being provided minimum cost and can therefore be discarded with lateral ears 29 beneath the Support B. by when the files a are worn out, with relatively means of which the guide is secured to a trans- Smau 10ss The u shaped links 3|, 32 may be verse plate l1 which is in turn rigidly attached formed with the aid of dies, and the spot welding to the forward portion of the frame 1ii. The/guide attachment of the files 3 to the links 3 l, may be l5 is formed 0f Sheet metal and 1S Preferably Of accomplished without damaging the illes so as to less transverse width than the files 3 above the produ a, rigid cgnnectiom While the pins 34 Support a in Order T20 permit the ming 0f naTIOW are only slipped into position during assembly of slots an'dalso the inside surfaces of holes in the chain and have no end heads, these pins are .PIECES resting UDDI! the SUDDOIG 9, the latter 0D- 'eii'ectively held against endwise displacement eration being facilitated by the disconnecting when the chain is under tension. The shoulders hooks 36 ofthe endless carrier. When the caron the pins 34 then engage the adjacent inner rier is unhooked a work piece having an opening surfaces of the walls of the U-shaped links 3l, 32, may be threaded over the guide and lowered onto and thepins cannot move out of the openings in n the table, the carrier then being again connected the intervening links 33. This feature has proven particularly advantageous in commercial use of the invention.

From the foregoing description, -it will be apparent that the invention provides a simple and durable filing machine or similar structure, which may be manufactured andoperated at minimum cost. The device vhas proven highly efficient in operation andfmay be conveniently manipulated to meet a great variety of operating conditions.

It should be understood that it is not desired to limit the invention to the exact details oi' construction and to the precise mode of operation herein shown and described, for various modications within the scopeoi the claims may occur to persons skilled in the art. I

Itis claimed and desired to secure by Letters Patent:

1. In combination, a series of files, a series of links supporting said illes, said links having overlapping ends provided with alined transverse openings of equal diameter, and pivot pins having medial portions of diameter substantially equal to that of said openings and having end portions of reduced diameter, said pins connecting the successive links of said series to provide an endless le carrier.

2. In combination, a series of iiles, a U-shapd link secured to each of said illes, other. links connecting the successive U-shaped links of said series, said other links-having ends disposed between the side walls ot the corresponding U- shaped links and having transverse openings of the same diameter as alined openings in said' sidel walls, and a pivot'pin disposed within each set oi said aiined openings, each of said pins having portions of reduced diameter coacting with said wall openings.

3. In combination, a series oi les, and a oarrier chain for said les, said chain comprising adjoining sets of links the end of one of which is disposed between side walls of the other, and which are provided with aiined transverse openings ofequal diameter at said intervening end and side walls, and a pivot pin disposed within each setci said alined openings, said pin being of lengthV substantially equal to the distance between the outer faces of said walls and. having ends of reduced diameter coacting with the openings in said walls. l

4, In combination, -a series of illes, a series of links supporting said illes, said links having overlapping ends provided with alined transverse openings of equal diameter, and one-piece pivot pins having integral medial portions of diameter substantially equal to that of said openings and having end portions of reduced diameter, said 'pins connecting the successive links oi said series to provide an endless file carrier.

5. In combination, a series oi' files, a series of links supporting said illes, said links having overlapping ends provided with aiined transverse openings of equal diameter, pivot pins having medial portions of diameter substantially equal to that of said openings and having end portions of reduced diameter, said pins connecting theY successive links of said series to provide an endless ie carrier, and means for maintaining said' links under tension to prevent displacement of said pins.

6. In combination, a series of files, a series of links supporting said illes, said links having overlapping ends provided with aiined transverse openings of equal diameter, pivot pins having medial'portions of diameter substantially equal to that of said openings and having end portions of reduced diameter. said pins connecting the successive links of said series to provide an endless le carrier, andresllient means coacting with said chain to prevent displacement oi' said pins. '1.V In combination, a series oi illes, a series of links supporting said illes, said links having overlapplng ends' provided ,with aiined transverse openings of equal diameter, one-piece pivot pins having integral medial portions of-diameter substantially equal to that of said openings and having end portions of reduced diameter, said pins connecting the successive links of s'aid series to 'provide an endless file, and resilient means coactingl with said chain to prevent displacement of m said pins.

carrier' link attached to each oi said illes, other links connecting the successive carrier links. some of said other links having ends disposed between the side walls of the adjacent carrier links and said files being of considerably greater width 8. In combination, a series of illes, a U-shaped than said carrier links and .projecting beyond said side walls, and a U-shaped stationary guide' having a recess through which said links are movable longitudinally and also having outwardly extending side anges engageable directly with the rear of said projecting file portions, the guide width 'across said flanges being less than the corresponding iile widths. Y

9. In combination, a series of les, a. .U-shaped carrier link attached to each of said les, solid links disposed between successive carrier links and having ends disposed between the side walls of the adjacent can-ier links, U-shaped connector links connecting the opposite ends of adjacent solid links, said illes being engageable directly with said connector links and having considerably greater width than said U-shaped links and projecting beyond the -side walls thereof, and a U- shaped stationary guide having a recess through which said U-shaped links are movable in succession and also having outwardly extending side flanges extending longitudinally thereof and engageable directly with the rear of said project- Aing ille portions, the guide widthacross said .flanges being 'less than the corresponding file widths.

10. In combination, a series of iiles each having a ufshaped carrier link l'tttached thereto, U-

shaped connector links interposed between the successive carrier links and engageable with the ends of said nies, said nies projecting laterally a considerable distance beyond all of said U-shaped links, solid links plvotally connecting the adjacent ends oi' the successive U-shaped links and disposed between the side walls thereof, and a reversely U-shaped stationary guide having a longitudlnal recess through which said U-shaped links are successively movable and also having outwardly projecting longitudinal side 'iianges engageable directly with the rear of said projecting fue portions, the guide width across said nsnges being less than the corresponding fileV width.

11. In a tiling. machine the combination of a horizontal work table having a relatively small centrally disposed vertical passageway, a frame supporting said table, a plurality oi vertically spaced pulleys supported from said frame', a car'- rler guided on said pulleys i'or movement of a portion downwardly ln a straight' line path extending through said passageway, l'e elements iixed on the front oi' said carrier to provide a substantially continuous front filing surface in said path and'dened between two parallel spaced vertical planesgsaid carrier providing side bearing surfaces laterally spaced between said planes and at a distance substantially less than the plane spacing, and other guide means including means rigidly supported from said frame and supporting said carrier and illes against lateral dis'- placement within said straight line path portion, said guide means at a point within the working zone of said straight line path being of lateral width less than said spacing of said planes.

12. In a filing machine, the combination of a horizontal work table having a relatively small 'centrally disposed passageway, a frame supporting said table, a plurality of vertically spaced pulleys supported from said frame, a chain providing flexibly pivot-ed links and guided on said pulleys for movement of a chain portion downwardly in a straight line path extended through said opening, iile elements fixed on the adjacent links of said chain to provide a substantially continuous front filing surface in said path and defined between two parallel spaced vertical planes, said chain links providing side bearing surfaces laterally spaced between said planes and at a distance substantially less than the plane spacing, and other chain guide means rigidly supported from said frame land providing a channel shaped prtion within said straight line path portion and open in the direction of said file elements, the side members of said channel portion being of an outside width defined between said vertical planes, the front faces of each of said side members providingl bearings directly engaging the rear faces of said iile elements.

13. In a filing machine, the combination of a horizontal work table having a relatively -small centrally disposed passageway, a frame support-i,

stantially less than the plane spacing, and otherl guide means rigidly supported from said frame and providing a channel shaped portion within said straight line pa h portion and open in the direction of said le ele-ments', the side members of said channel portion being of an outside width defined -between 'said vertical planes, the front faces of each o f said side members providing bearings directly engaging the rear faces of said file elements.

14. In a filing machine the combination of'a frame, a plurality of vertically spaced pulleys supported from said frame, a horizontal work table iixed on said .frame at a level between said pulcondition, means normally continuously stretching said band during operation of the machine, the last mentioned means being adjustable to provide the slack necessary f or said element disengagement, and guide means preventing lateral displacement of saidilling surface in said path including a guide fixed with said frame and providing vertically disposed bearing surfaces, said guide being of a width no greater than the spacl ing of said vertical planes.

15. In afiling machine the combination of a frame, a horizontal work table supported from said frame, said frame providing a portion extended above and over said table, a plurality of pulleys supported from-said frame respectively above and below said table. a carrier guided on said pulleys for movement of a portion past ysaid table and in a straight line path forming a working zone, file elements supported from said carrier to provide a substantially continuous i'ling surface within said zone and dened between two spaced vertical planes. and means substantially completely enclosing said carrier and illes within said working zone except at points exposing said filing surface, said means including other guide means at the rear of said filing surface, and oi' a lateral width no greater than the spacing of said vertical planes.

16. In a filing machine the combination of a' frame including a pair of laterally spaced Yside members,a base for said frame, sheaves rotatably supported between said members, driving mechanism for said sheaves disposed between said members, an endless carrier movable by said sheaves between said members, files movable by said 'carrier along a definite path, a horizontal work supportI secured to said frame and providing a vertical opening, said carrier and file path passing downwardly through said opening, and guide Imeans restraining said carrier and illes against lateral .movement at the level of the upper surface of said support, said guide means at said level being of awldth no greater than the lateral width of the illes.

17. In a illing machine the combination of a frame, a "plurality of vertically spaced pulleys supported from said frame, a horizontal work table supported from said frame at a level between said pulleys and providing a vertical openy ing, a carrier guided on said pulleys for movelment of a portion downwardly through said opening in a straight line path, nie elements xed on said carrier to provide a substantially continuous filing surface in saidpath, and defined between two parallel spaced vertical planes, means adapting said carrier and illes for removal and replacement through said opening and through a work piece supported on said table including elements laterally disengageable when said carrier is in longitudinally unstretched condition, means normally continuously maintainin'g said carrier in stretched condition, and other guide means supporting said carrier and files against lateral displacement in said path at the level yof said table, said other guidemeans being of a' width no greater vthan thespacing of said planes.

18. In a iiling machine the combination of la' frame, a plurality of vertically spaced pulleys supported from said frame, a horizontal work table supported from said frame at a level be.- tween said pulleys and providing a. vertical opening, a carrier guided on said pulleys for movement of a portion downwardly through said openling in a straight line path, leelments'ixed on said carrier .to provide a substantially continucus ling surface in said path and defined between two parallel spaced vertical planes,

v'means adapting said carrier and illes for. re-

supported on said table including elements laterally disengageablewhen said carrier is in longitudinally unstretched cbn-v dition, means normally continuously maintaining 'said carrier in stretched condition, and other guide-means supporting said carrier and illes against lateral displacement in said pathl at the level of said table, said other guide means being of a whereby to permit work pieces to be threaded over the guide when the carrier is removed, and of a width n greater than the spacingv of said planes.

19. In a filing machine the combination oi a frame, a plurality of vertically spaced pulleys supported from said frame, a horizontal work table supported from said frame at alevel between said pulleys and providing a vertical opening, a carrier guided on said pulleys for movement of a portion downwardly through said opening in a straight line path, le elements xed on said carrier to provide a substantially continuous illing surface in said path, and deilned between two parallel' spaced vertical planes, means adapting said carrier and les for removal and replacement through said opening and through a work piece supported on said table including elements laterally disengageable when saidlcarrier is inV longitudinally unstretched condition, means normally continuously maintaining said carrier in stretched condition, and otherv guide means supporting said carrier and les against lateral displacement in said path at the level of vsaid table,` said table being pivoted and said other guidev means,l being iixed with said frame to be stationary during pivotal table movement andoi' a width no greater than the spacing of said planes.

20. In a ling machine the combination of a frame, a horizontal work table supported from said frame and providing an opening, said frame providing a portion extended above and over said table, a plurality o! pulleys supported from said4 frame respectively above and below said table, a carrier guided 0n said pulleys for movement oi a portion downwardly through said opening and` in a straight line path forming a working zone, le elements supported from said carrierA face within said zone, carrier within said working zone and oi a width ylimited vertical extension above said table -at the level adjacent said table no path being of lateral to provide a substantially continuous filing surand a guide for said ing and in a straight line path forming a, working zone, file elements supported from said carrier to provide a substantially continuous ling surface within said zone, and guide for said carrier within said working zone and of a width the filing surface of said illes, said guide being supported from said frame to be undisturbed by thepivoting of the table and extending from beneath said table through said opening and into said working Zone.

22, In a Illing machine, the combination of a horizontal work table having a relatively small passageway, a frame centrally disposed vertical supporting said table, a plurality of vertically spaced pulleys supported from said frame, a pivoted flexible chain guided on said pulleys for movement of a chain portion downwardly in a straight line path extending through said passageway, file elements chain to provide a substantially continuous front ling surface in said two parallel spaced vertical planes, said chain providing side bearing surfaces laterally spaced between said planes and at a distance substantially less than the plane spacing, and other chain guide means including means rigidly supported from said frame and supporting said chain vand files against lateral displacement within said straight line path portion; said means at a point within the Working zone. of said straight line width less than said spacing BENJAMIN GRoB. THEoDoRE Gaoa of said planes.

wider 4than work table supported xed on the front of said Y path and dened between 

